L. L. Meisner, A. I. Lotkov, B. P. Gritsenko, Institute of Strength Physics and Materials Science of SB RAS, Tomsk, Russia; S. A. Shabalovskaya, Ames Laboratory, Drake University, Ames, IA; V. P. Rotshtein, K. V. Karlick, Institute of High–Current Electronics of SB RAS, Tomsk, Russia; V. V. Rasdorskii, V. A. Kopisova, Russian research and practice medicine center of SMI, Novokusnetsk, Russia
Results on elemental compositions, structural phase conditions of thin surface layers and physical–mechanical behavior of the TiNi dental implants processed by the high–doze ion implantation (HDII) by Ti, Zr, Mo, Pd ions and the pulsed electron beam melting are reported. The low–energy (~30keV) high current (~30 kA) electron beam (3–10 J/cm2, LEHCEB) pulsed with 2–3 ms in time length have been used. An irradiation treatment was carried out in an argon atmosphere (~ 10-4 torr) at different contents of carbon and oxygen impurities in a residual atmosphere. Especial attention is concentrated on physical and chemical properties of the modified thin surface layers. Special features of the deformation regularity of the surface modified alloys are caused by qualitative changes of their structural-phase and defect-system states. Correlation between the subsurface layers elemental composition of the TiNi implants and surface treatment conditions (electrolytical polished and irradiated) is shown.
